27096

Appears in sequences

• sech(arcsin(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-23/4!*x^4-20/5!*x^5...at n=9A012327
• Numbers k such that k and 5*k, taken together, are pandigital.at n=21A115925
• Numbers n such that prime[(n + 1)^2] - prime[n^2] is a perfect square.at n=28A145290
• Transform of central binomial coefficients A000984 whose Hankel transform obeys a Somos-4 recurrence.at n=9A157004
• The fourth row of the ED1 array A167546.at n=15A167547
• Riordan array (1/u,(1-u)/2), u=sqrt(1-4x+4*x^3).at n=45A168151
• Riordan array (f(x), x*g(x)) where f(x) is the g.f. of A157004 and g(x) is the g.f. of A157003.at n=45A213221
• Numbers n = p * q, where n, p, and q together contain all 10 digits at least once.at n=15A253172
• Number of nX2 0..1 arrays with every element unequal to 0, 1, 2 or 3 king-move adjacent elements, with upper left element zero.at n=10A303721
• Triangle read by rows T(n, k) is the number of permutations on n elements whose square has k descents, for n >= 1 and 0 <= k <= n-1.at n=38A373691